The onslaught of promo included a video of the pop star sitting down at (and attempting to use) a computer and indulge in pictures and videos from her past. It includes her time on the Mickey Mouse Club with Britney, landing her first No. 1 on the Hot 100, winning the Best New Artist award at the Grammys, “Beautiful,” filming Burlesque with Cher and more. It’s quite a trip.